Half to john bell



(NoModel.) 0. C. RUMSEY.

DOOR KNOB FASTENBR.

Patentedot. 16, -1894.

Fl I.

WITNESSES I UNITED STATES PATENTV OEEI-CE.

OSCAR C. RUMSEY, OF WHITMAN, MASSACHUSETTS, ASSIGNOR OF ONE- HALF T0JOHN BELL, OF SAME PLACE.

Doos-KNOB FA'STENER.

SPECIFICATION forming part of Letters Patent No. 527,560, dated October16, 1894.

A Application led February 19, 1894:. Serial Noi 500,614. (lilo model.)

To all whom, t may con/cern.:-

ABe it known that I, OSCAR C. RUMSEY, a citizen of the United States,residing at Whitman, in the county of Plymouth and State ofMassachusetts, have invented a newand useful Improvement in Door-KnobFasteners, of which the following is a specification.

This is a device for locking and unlocking door-knobs, so that they maybe prevented from being turned, o r made free to be turned, as desired.

The nature of the improvement is fully described below, and illustratedin the accompan ying drawings, in which- Figure l is a vertical sectiontaken on line fr, Fig. 2, through the shank of a door-knob provided withmy invention. Fig. 2 is an elevation of a door-knob provided with myinvention, the door being shown in vertical section. Fig. 3 is a sectionsimilar to that illustrated in Fig. l, showing a modification.

Similar letters ofreference indicate corre-y sponding parts.

A represents a portion of a door; B, the door-knob; C, the shank, and Dthe escutcheon screwed to the door at d. A semi-circular or arc-shapedblockE is screwed at e to the upper side of the shank C, and is providedat its highest or central point with a recess E. An integral bracket orover-hanging horizontal projection H extends from the escutcheon overthe shank C, and a vertical perforation h is formed in said bracketdirectly over the recess E in the block E. This perforation is enlargedat a short distance below its upper end so as to form a shoulder h asshown in Fig. l. On one side of the upper surface of the bracketH is aledge or ridge I extending from front to rear and inclined or curved upat I rearward from the front edge, and provided at the top of theincline with a transverse notch or recess I.

Within the perforation h is a locking bolt consisting of the verticalportion K, `the enlarged lower end K and the horizontally extending armor handle K tipped preferably with a small knob or ball 7c. A spiralspring L surrounds the part K of the locking bolt and is contractedbetween the part K and K is pointingtoward door is held latched. If itis desired to allow.

the door to be unlatched,the handle is swung toward the left and mountsthe incline or curve I on the ridge or ledge I thus causing its lowerend K to be lifted out of the recess E against the power of the spring,and then said handle may be dropped into the notch or recess I as shownin Fig. 2. Thus the latch is freed and remains free until the handle isswung forward or toward the right again.

In the modilication shown in Fig. 3, the

vblock E is omitted, the bracket lowered, and

the recess made in the shank itself. In this figure I is the shankprovided with the re- R', and S is the locking bolt. The operation isexactly similar-to that above described, it making no difference whetherthe recess is in the shank or in a rigid attachment thereto.

Having thus fully described my invention, whatI claim, and desire tosecure by Letters Patent, is

The hereinbefore described improvement in door knob fasteners,consisting essentially of the combination of the semicirculararcshapedblock E provided at its highest or central point with therecess E', the bracket or projection H extending horizontally over theshank of the door knob and provided with the vertical perforation h oversaid recess, said bracket being provided with the ledge or ridge Iextending from front to rear and inclined or curved up at I rearwardfrom the front edge and formed at the top of said incline with thetransverse notch I, and the locking bolt consisting of the verticalportion K and horizontally extending arm or handle K adapted to mountand descend cess P,R the block with inclined ledge' said incline orcurve by swinging said handle, 9 5

OSCAR C. RUMSEY.

Witnesses:

R. C. TUEPEL, FLORA E. TURPEL.

